I still don't finish this, but so far is amazing, show the insecurities, innocence, and a lot of dark problems for "love" that come when we were in middle and high school or even later, yeah, it have cheating and the "ntr" vibes, but this actually pretty common irl, sadly, and it have sense, not like those hentai story's that put ntr just for the sake of it.
Still, it is a heavy read, there is not happy endings here if you are looking for one.